I try to connect the combiport on CCR1009-7G-1C-1S+ with S-31DLC20D fiber module to UBNT FiberPoe Converter with S-31DLC20D.
Link doesn’t go up.
Exactly same setup on CCR 1009-8G-1S-1S+ with S-31DLC20D fiber module to UBNT FiberPoe Converter with S-31DLC20D works.
Connecting both routers CCR 1009-8G-1S-1S+ with S-31DLC20D to CCR1009-7G-1C-1S+ with S-31DLC20D works.
CCR1009-7G-1C-1S+ :

.

I sent supout to support@ and i post the problem here in the hope to be usefull to anyone who gets trouble with same setup.